package com.example.common.core.utils;

import com.example.common.core.constants.JwtConstants;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Map;

public class JwtUtils {
    /**
     * ⽣成令牌
     *
     * @param claims 数据
     * @param secret 密钥
     * @return 令牌
     */
    public static String createToken(Map<String, Object> claims, String secret)
    {
        String token = Jwts.builder().setClaims(claims).signWith(SignatureAlgorithm.HS512, secret).compact();
        return token;
    }
    /**
     * 从令牌中获取数据
     *
     * @param token 令牌
     * @param secret 密钥
     * @return 数据
     */
    public static Claims parseToken(String token, String secret) {
        return Jwts.parser().setSigningKey(secret).parseClaimsJws(token).getBody();
    }

//    public static String getUserKey(Claims claims) {
//        Object value = claims.get(JwtConstants.LOGIN_USER_KEY);
//        return getString(value);
//    }

    public static Long getUserId(Claims claims) {

        Object value = claims.get(JwtConstants.LOGIN_USER_ID);
        return getLong(value);
    }

    private static Long getLong(Object value) {
        if (value == null) {
            return -1L;
        }
        if (value instanceof Long) {
            return (Long) value;
        }
        return -1L;
    }

    private static String getString(Object value) {
        if (value == null) {
            return "";
        }
        return value.toString();
    }
}